I just updated the whole drools thing (core + dependencies) for my Seam application, and ran "ant dist" for Seam minutes ago and updated the seam libraries in my application. Now there is this problem(Warning: the stack trace is long. Sorry for that....)

Exception during request processing:Caused by javax.el.ELException with message: "javax.ejb.EJBTransactionRolledbackException: org.drools.compiler.PackageBuilderErrors cannot be cast to java.util.List"